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When looking for a part for this ( i realize it is upstream) they refer to the part(s) as left or right, not front or back. Can you tell me from the engine code whether i need a left or right upstream sensor?

PO154 O2 Sensor circuit no activity detected
Bank 2
Sensor 1

Vehicle: 2007, Hyundai, Santa Fe, Limited, 3.3L

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Hi there,

When this happens you basically have to go from the side of the engine with the drive belts. So, in this case you are looking for the first sensor on the right hand side of the engine.

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